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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2dea1b5db9bcc7c8b1d84ecdf4be8e000fd744e19de6734b8397f2a980363993' 
  AND token = 'nvIvtC7wOebNHlEUItWF+/pM2NIUwzKPO45xeO1QbQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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