Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27900e1dd9f16ca5b92cb5ca4a4ebf0683a3a2c2207c80e34e03f03c3d60778c' 
  AND token = '9yF8YnFCwekoMhoKGFB75fGXLGO4G2jku+QokRxffgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}