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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd6b118030a71ee2ff28b38c8a4fd4dfae0511900b6c53f8833b23a5f8e1c1df1' 
  AND token = '/qGd9rIXmJja0wIm27sSvv/iX9c5nO5JFbKRe4hTC1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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