Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6ead68877501ac8d53685679cbe1d32b81743d143806ab8545871f716c7bc55' 
  AND token = 'PVUrpbJMw6TSbg/JVwD97uPMlZb7H0Cyv+sozKTRouM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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