Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7e326bde39fe21d7a019cab834b08dd71bd66493b676a9f5895a63f85b2d0cb' 
  AND token = 'OEaDpRj1F6X3XJDuWp4lIrj9WUqk9AuN39xNCKlFk0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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