Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66242e7baa95895d13c8d24fa55900a8519691f4a545e97ac2da97c8992fd391' 
  AND token = 'U09OGJgpc4dFVOVp+dJ8MpjAJKXcOnvqVf3WwtFNt88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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