SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c69b3f05c3a1525d87a099f2f5cba5e39866ce31627c8b99cdffbf4e1c32a2fa' 
  AND token = '1Nz9EQEV3XuvJlyJblzVK/JCd5oZMAkfUXGXyVZgBlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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