Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60b326efbbc5c6acc4b0ca706d2d651be179f3534ae3b23c9c6ae1a038495476' 
  AND token = 'zCk6zGKjj3ruCdmGu5mc+94iG5N/3D5wVC7nhQ6rPo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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