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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9379d5172c5ee164ea81d927b9a53ea616686655a410320fa8cfb43ca81fd3b7' 
  AND token = 'TRaKrjCWkYoiax8RUFo0zdTl5lZrD5HaR7DTx34QXMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00152

JSON explain

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