Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0273c1a4ac1958312266ac386d8156aacf7a18be892e05f48f219e4cd8f510b2' 
  AND token = 'Pv303N11dpsvoxVZ3B9iyxoL9QpH7GfOtX7AcBY7taI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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