SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9132f1fbdc36cfd14bc500c5ca3957b570f6985006ff70fe140be255e5af6bce' 
  AND token = 'YaCVdjbnqgc7B+MrBzYDDrRKm3vW2sTNawgjxXzvtjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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