Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd571be6ab50ac2729d0009d4b0224f321287fd45af8bc551f61476377af080e8' 
  AND token = 'Yos6Zehl3vmQ5ef0YVNTMnAHZ2dCZ2VJNe6PwdHPgHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}