Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57df6876acf250f4404ac1165d7bf1c8535f2a98137b3e2316e16035085c6ecc' 
  AND token = 'IfEmHzwgt+GTPGprk2w9vIamVtRA6Cr6ScjvdrAY4oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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