Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd63986efb4a7d924de14a7d961e4177782bb33e4f0a039ca79adebbbf25bcb5' 
  AND token = 'wvjEcwW8u2Z8QnKqfWc0e0VL3ejz0gEscn0YdYRn9b4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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