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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'ca9c302024211fab543f0ec603ef11f14b6a570b5bf53ab35e8b5b7ec632aaab' 
  AND token = '9zOdMyubKe+D2svIR3wjhltV9WNeqkFv1XD6unP0ZCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01534

JSON explain

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