SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99ab26406d29c7c519f00973f3a453466f681a7ee528021f3fac6247b4b176cf' 
  AND token = '10OHJ+ljZn7LhClYPto1TsnY4dmzBUhibRiky1zgz6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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