Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54371ef759cef843537d2cb44c7bf8cb92ce98687264f57e3f25681a3640454c' 
  AND token = '1C1s4YPPEtJqE1sacYDg8SsJQ3PIV6eNRJR8+O/w0tQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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