Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c624e873c22a5b8d08653cb4ac46c42f90c8c162b15f1dd19612a21fd11c4b85' 
  AND token = '5TcC10Rhwt5vaK5LAEe2dIBE8N/ZyqADc/C4NoA4Wi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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