Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13c3c5634ef1efd6ddcdb14226656ef309d7b9d0607f4f1bbb6a602c3736e572' 
  AND token = 'OST4VCpzq2wd9ibdGlkM5pWN+D2LvXh9VmjanzDfq/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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