Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f9679ece47bb4d23f5c50feb87bf07280bb82b21e0acdc70efadb33dd2241d4d' 
  AND token = 'HJqhhAeJIaD3bF6V+GoRhFIuNPdncnPcFCliBWWVq4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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