Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6576c62a9da04d7aeb47a41743c402ca93a8ae6292e3957d13650eeff0bc6f35' 
  AND token = 'e98AekpTH26WCkJXrgpgV3Y6bIzkA2qfMXogB+y7FFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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