Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efac0ff699dd991afa531ec2b98e05d18e976a979cee6a3ea4e0dd89b46e75a8' 
  AND token = 'Weg9WXMy5lbxanBAzcaMH0S6MeG1AEV8dXo4YwEp7v0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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