Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a72a6b3ff9fb7b0399903f6c4c0f5448aae474e114ed105e5d7b5051eddaeece' 
  AND token = 'cNcJVQkUq3OY6pltisGnS/4513s7DvrU9jLr2Kd/GmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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