Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fde2ded52e6a0a80dfaef60c3cc94d769cb4be11424ff4ab8bc96ea9df69433' 
  AND token = 'Vogg+gJZRr+QETyPxP0iyw83FIJJZ1R/9M7oTfehJo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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