Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '769e696cfae9b6286c0346ca62c4a912eecf47a4b78a1e93d457823a9fb4822f' 
  AND token = 'L3BQSDYANGFJXk+78ppnSEa+1qwGnL2eFv8jay+YXMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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