Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6d92c69ce1ff9319308ddfa3fea144153d4600e5781d332ffae9884b7d4969d' 
  AND token = 'gSrgMqkuJQc4Q0fXhxcyTwU25z9il0aNCeuhQsjNgG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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