Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffe8348fa0d8fa153f3005a3d8263a6fc44726bf5197b77533e6d6053f1f7781' 
  AND token = 'ruQPJSkrzeY4W9k+CpyFjjj5lmxYRFh8KnHXrMp4ojM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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