Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60fc6e34d5b5b447f5b038eec584d1fd0465b2fecdab33a0d968827f247a1dd7' 
  AND token = '2KdxekWDOFT9AcwbbGeIj1NEl19io//CY7TM7x7uvgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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