Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb6b3fac7beeda128c270c58899dc4182df9ce89a9c9bc3804ef0f992f78f6ca' 
  AND token = '60RVCZizsdDJMOJgwFoIq26XnZf2AexjVgbKZFi4Y6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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