Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ced59d8b4073d8679abb6e7d8f1f34473dcec9d9bedfd79f2d8a3df23db528fa' 
  AND token = 'x4IXmjB8ptMNrX0IwwXn5V3EfIUefexI0IwJC+5Iuek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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