Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2eb4e26b7513dec8589cfd54b313709ed0eea204a1667cec2601f0a8da552cbb' 
  AND token = 'Hup4H5+eqvSE9LcD+8dWTyVXAzLYpIcfHqWZVPHIUBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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