Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0f365381ce4d1668cfcb52c68f3c8f47a5b97c498d27feb8903c876fb902370' 
  AND token = 'YSAt8CtLcTH1BflpurXexd9TrOTYrBu+kwKLPAMg0yc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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