SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32dd8b18f18bf566605170125c5fd435f3d4797fa3693f4e19837bd7469813b5' 
  AND token = '8bG6WzoYWodHyVKm1WUMY3RvlBpRUkAXQ/0agTlE8Ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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