Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4499590577b548b20203fb710a0164f21b803ece90d70a17c5e56dcdee6569ad' 
  AND token = '5tJ/qsWL10gfrXJtrl1VJYRx3FTp4I6QRJNRBo3fNuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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