Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81c77d787dff36daa8d4118602d6f37d704dc488351fd1f8f750f6607145ce3d' 
  AND token = 'DbGoINRilgTl1hqGDHzSJ9NCukTsHa04TO/sBKTmD8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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