Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb66bfb01a6e0413d61950030696c9aefc6932921f259358298d6d8714c2f606' 
  AND token = 'I1tFkqRkMgH3xStH9+ICU9VMrDax0uYR6S5LJPGquGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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