SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '622188781a5cf335e101dbd1cf0156044a1bd77f1aeb02d0cbda6f99b8e38841' 
  AND token = '3ROLt2u5qfvuf7quS7kj+zkToqVpX/KEc5w0S4QYgJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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