Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7575a753a5c1bfa728c0ad7e622775f00b4184e85544ef12c02b99aaaa9b1af0' 
  AND token = 'dJeW+pIHcta6yVSh6vHWhWegugALEgmwn0iC+uZzR4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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