Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52b058aebeafef527051a927e3dc4ff04fc21031494a96998cd7e74ab6351de5' 
  AND token = 'kicspzrKjp49u0y7vyb8LUgMIhyhmCqzrzeUW182h/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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