SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f60869c7f0140df8e972db2ccd6424a2a815fd9cf92b3f8b6dd547e891165a5f' 
  AND token = '2Fj3zP9n5FEG31g91RAzK0cSSnRhoDXOLoy4WS+NBrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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