Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b782828602faaef5559411ee066d7193b874897f327075b74aa0fb38bbce08bb' 
  AND token = 'bvAaxQulynn9wCUk6+H1IMsLGrdA7JD6GRTaSsVLIk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}