Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b803b0ea993efed8f3528ab003b2a89e623655a33cd1273a307c0f625e86b04b' 
  AND token = 'N+d9lJT8swa2Ae7VDPJ6hHV8ILK9cnTkgRFtX1QYeSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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