Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af897440bd9f7d06e0d82574f6cc3724ff54df3861fcc1633c0a8625987537bf' 
  AND token = 'laXFyyPKoXrRKDPmCLA49KW9mgIeBosSMcnv8QInU6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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