Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdf7e14a339227b1ceb2b9ce3974eee85d3afdebfd62699db45ee59f6c5e067e' 
  AND token = 'dsm3vBv27iip021BCqPZ1WpBYvMdZLi25k5opcLU5Ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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