Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61a602465254ebb73d43c8808a46a2d98b57a07ab67b691915015ef5cb95681c' 
  AND token = 'oad7Apxxgb35jlqTLHRldqCJkpGBOlEUB3Nmsr9+P5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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