Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '0248bbad0565cb5d5d0b821bfb9f146def6656b7bd65aba42faddec3404128d2' 
  AND token = 'qzJGlrg2RbMWzblUtw/EWHFuLWR0/vdaTDL34II7+G4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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