Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab10a778d14c9ce6c2420de3ba39b0c66830d7c1915e61d5f7f6ede0583e31be' 
  AND token = 'B9ZwAmnVkgXmuA+Z+uC/fvR8Zii10HDje+sehGQeeQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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