Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59a927fd6ab129bf9101ef8e1d980a7826466b4710bd618b9d1cdcc1a4a702ff' 
  AND token = '/TkyG/PIAvjW6/BBJssB+3NbAbjEkHCbtYhzRFnD+dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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