Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98de06f8655d5f740fc96f1f748d7eb7dd1e15b5fecabc8d16a8e0a4d5ce6b79' 
  AND token = '7wCyrD3CwK4raEbnYa76CNLOgnj3o4ivqAd4/cLOpto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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