Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5cdc0d50241f79c218b1434db953f873af1486b7b7b4d7c572195b86170b816' 
  AND token = '4LGIzT4a761RiwlCwzQgAPSAEtOw/eu6ihxlPLFOFVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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