Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '992e86604dcba310de738579dc3b727f82869ae0f411ec6902111e51bf67384b' 
  AND token = 'RflX3e1TevKav1eXIcXChNFkHPjg8co367AomfvdyQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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