Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58e91d163904574443f146004dc9e737b604faa144a7d194264132c7145952f3' 
  AND token = 'VkxxBzRFkXfwkKyzxguTZKVcZbCxzbM1uid00aSnYAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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