Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '187913f2610297e4ad5140c64ac2546d3272e70dff01fccbc504d55d3bb5d3cf' 
  AND token = 'A4sVwO8p8ijo6mkckS/oEdGScTXvU8mYfv3Ss9zsbpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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