Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28d9a55c9e431d0736aa4af3f83558ead506cb9b9716b372b48389e461e7ae43' 
  AND token = 'ci2s7Qf3rVbBiF/pFeiagiiJyetVecWu/kjgz6YqtwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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