Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e575697dfb842f881882f25b77d95155bc252009594e28cdeff146152419feef' 
  AND token = 'SEcsB5XHegFDD7rxOl3yv0SG5RQ3+h0LvnphjGnGizE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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