SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '632f77fbaac0543b043b2e88854bccd4a8f13d711ce67022e6dbd99d7edffd03' 
  AND token = 'GlSJzHQ/r5PpzCiROjzAEvFvK/ncnj0eo/CqgNzjmdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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