SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a85f38a46086254e217b2d00c3d3489a8c3877e3b4a4cf750046e23cca5ffde0' 
  AND token = 'KOKL/mwShBVWG98XrhIDEaRGC7X6q7hU0VfbcIThoO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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