Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '083e673fdd3091ab14883615311caa2a443dd658fd13a4330004ee3b17719108' 
  AND token = 'LYQRAPfBzm3IEUaHaImRy77VNCIzCshejFSDRpsTd1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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