Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd4baac30888923745a92df74c307dc884d7f4159ac74e20b6af32f7fb8e99a4' 
  AND token = '2KQOdweoIbB0PKSrGC0Ax6AN+V7BhA7TL6GTmCaR90c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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