Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '761b2dfaaf02b6a6d0a6cd159d99fc833d10d5ff68bcb52168f29d363729f1e6' 
  AND token = 'lEs630q5+XZVfKramdB70VV+Bm9cwPisAGq+p/vho8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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