SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2216352def4ceb15617eb1e31333adb35d19e94588ff460dfa9d791847b12ac8' 
  AND token = 'Rhcy65oQ9Zj6IfHhJ0XW2SnjvEG0q+ivWnf8+VXNbhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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