Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11c8d13ead8f6c07f87c7011e335589247af272e9b6c89d0d41669056aa92a9c' 
  AND token = 'zS8bSBlEaTbItdMfFYVYN5OM0NsZzpJaqGVOjWyvMQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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