SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f22996201c8f90d1a505152fdc7f2db71bae73eeb6f35f45ed96ce408cfc011' 
  AND token = '+X6zOXZ0Rxx7zAfn3NGXGjpQE7sFCVtwuJOcq+boRBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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