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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '995bbd62003f7bc9a49dec8a6d9df9f084e2401ed65cf9bfbeda74cf0eb0acca' 
  AND token = 'sH6d1jY+WOW8g05G156l3UaAuNymtNjVk5LjMHq++dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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