Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d0f1fcce795102b9b53bfccd811e81dda1cf7179c9d1d2d638be05a54b2a9b3' 
  AND token = 'tRZupPy2MT3P68cx1NmTuqWBn8f2aVL3D+YKKhDE5kY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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