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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '089123631444a95ddff6c4ad4e2321057784abfda9ecd488bb124e5f718ec6a9' 
  AND token = 'OeUi+EF3t13WOi2pRmDwqcQ9kiHVgG8rIv2JS+5+VYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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