Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4188065c01f3d676417609cf37a2ef42e63e77f3a65887b3cc78fd1eb573390e' 
  AND token = 'xfAKULTyOBdkp99O+7QyLo9DhT9CUNvqnLQhZGCKXs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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