Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0faabaca1b3f8a45868d5cb240811648e656f5e18a0da135998aae8a47f39ba3' 
  AND token = '/TrHZhZQVi4CiHA8kA8x1aorPnS2mAGwLKJJKtFC+ug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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