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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '3fb33bbfcbe715e8889b3cd1ce56e7c8b844377825e75b3354ed92af5bb5274b' 
  AND token = 'V4ImgSODyBMSgMHBFe97tEDHPCW+BK+vA/fQtykyeY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00776

JSON explain

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