SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b3b56ad09170a82ad8cf81fd4ed9c3ef3c9ab26170336272a982c6951f6e5924' 
  AND token = '8hrHG69Zn2sDdPrj/IRwm3SDmCjGL53De5YER5fBZhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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