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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94e12c9cd9efa8e67b906574668dcad9608c799ef65662da8b568f73739cde35' 
  AND token = '1oXEfOqc5d1ZdMIiIJ1xnvcg2qq+2JXJc8oT9nQZuNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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