SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22d1b836dbc63bc95716e0bde4e6f7a65192b3c43438964f838815c55d64cfda' 
  AND token = 'OB+sqpS8koBRkVlFZHis/hHwpqGR5eKnYWnyFArASUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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