Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a864f0ad07764988021485d240effbdcf9a3de09b48247fc2beab8789f032333' 
  AND token = 'rlR2wwHVLtUqxPvzBm7nlay8fAb5CijwjTBK1DHauD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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