Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9b7522db81de29448bae0766280af36b557a55a1ac95c9af8728bb365dce687' 
  AND token = 'xs82Uq29p3IayP2IdgLcq1hymwbuNr2kNjwWa/OGkmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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