Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '6c4c0b673092da00503fa5eb6db863b47e21748cfd6c8194b70b300de9f9e6be' 
  AND token = '1/Q9dXBEp8F18U3VFsnCvW6HCEe3gUjxZjJ/dNh/kSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00749

JSON explain

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