Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fc9bb772974a836b18b8e2fcc93dce3fedb909603e5075c85eb58d4741e07ad' 
  AND token = '/62zixiphzWkL6vWND0SferwEUs56ul6iPppiYuDs68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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