Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8442d1e7e452aa3c5671e9d3e260d2487b72f9350ff895f44a6fd12f32c816d4' 
  AND token = 'Ab4cIEUWTB63WP5/zxBOzgzM8ANZfrHM5IrQHMRPZSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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