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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '4e3ed91e4bfcd762c085ceb25d923fc3061b9925004f412fd40487dac0774cae' 
  AND token = 'X1RElc+MwirRjW23BPcwSbWAvFhoQIM2xeN21SPqcL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}