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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d070400b5abaacce36e1d7993972f890c2211b2179b6c679257ae836eec562c' 
  AND token = '8G5sGo4VWpWJ5FGs+DE8WjoQJRpQSz+kNzHbje/ouOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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