Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b82ec8129171773f31d885f6caccbbeb9b690360172e63c743b14e0c2a55e84c' 
  AND token = 'u17QkzA62/eWS3JEHltwyRx6yIffqnpHPYOjsv9wgPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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