Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4302b6bf3e03f6cd5b7712c2f86509a3aeb53a45dfd7e7e7fb37f44506585256' 
  AND token = 'GjFuAhnH7KCOL4s73bEwhpTgL0JxYb+hYaiGd5CGTF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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