Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '704fa1be1a437913ad29314d2f162b58ed8db837c12a616bedd531ea83e48fb4' 
  AND token = 'N7FSvArnbYijfzYzOhFlGuEt/Zp7/PPtb8pysegBg7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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